$218 Cheap Flights from Moline (MLI) to Seattle (SEA)

View $218 flight on Tue, Nov 11, 2025Opens in a new window

Popular airlines from Quad City Intl. Airport (MLI) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Moline to Seattle (MLI-SEA)

Prices were available within the past 7 days and start at $218 for one-way flights and $289 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Jul 20 - Fri, Jul 31
MLI
Moline
SEA
Seattle
$289 Roundtrip, found 4 hours ago
$289
Roundtrip
found 4 hours ago
Select United flight, departing Mon, Jul 20 from Moline to Seattle, returning Fri, Jul 31, priced at $289 found 4 hours ago
United
Fri, Nov 14 - Mon, Nov 17
MLI
Moline
SEA
Seattle
$294 Roundtrip, found 1 day ago
$294
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 14 from Moline to Seattle, returning Mon, Nov 17, priced at $294 found 1 day ago
Delta
Wed, Nov 19 - Fri, Dec 5
MLI
Moline
SEA
Seattle
$299 Roundtrip, found 4 days ago
$299
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Nov 19 from Moline to Seattle, returning Fri, Dec 5, priced at $299 found 4 days ago
United
Wed, Apr 1 - Tue, Apr 21
MLI
Moline
SEA
Seattle
$307 Roundtrip, found 1 day ago
$307
Roundtrip
found 1 day ago
Select United flight, departing Wed, Apr 1 from Moline to Seattle, returning Tue, Apr 21, priced at $307 found 1 day ago
United
Thu, Mar 26 - Thu, Apr 2
MLI
Moline
SEA
Seattle
$310 Roundtrip, found 5 days ago
$310
Roundtrip
found 5 days ago
Select United flight, departing Thu, Mar 26 from Moline to Seattle, returning Thu, Apr 2, priced at $310 found 5 days ago
United
Wed, Apr 1 - Tue, Apr 21
MLI
Moline
SEA
Seattle
$312 Roundtrip, found 1 day ago
$312
Roundtrip
found 1 day ago
Select United flight, departing Wed, Apr 1 from Moline to Seattle, returning Tue, Apr 21, priced at $312 found 1 day ago
United
Wed, Dec 17 - Mon, Dec 29
MLI
Moline
SEA
Seattle
$314 Roundtrip, found 5 hours ago
$314
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Dec 17 from Moline to Seattle, returning Mon, Dec 29, priced at $314 found 5 hours ago
United
Fri, Dec 12 - Tue, Dec 16
MLI
Moline
SEA
Seattle
$318 Roundtrip, found 1 day ago
$318
Roundtrip
found 1 day ago
Select United flight, departing Fri, Dec 12 from Moline to Seattle, returning Tue, Dec 16, priced at $318 found 1 day ago
Alaska Airlines
Wed, Dec 3 - Thu, Dec 4
MLI
Moline
SEA
Seattle
$340 Roundtrip, found 1 day ago
$340
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Dec 3 from Moline to Seattle, returning Thu, Dec 4, priced at $340 found 1 day ago
American Airlines
Sun, Mar 1 - Sat, Mar 7
MLI
Moline
SEA
Seattle
$351 Roundtrip, found 6 days ago
$351
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Mar 1 from Moline to Seattle, returning Sat, Mar 7, priced at $351 found 6 days ago

Find the cheapest month to fly from Moline (MLI) to Seattle (SEA)

February is typically the cheapest month to fly

From $258 - $749 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $314
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $314

Frequently asked questions

How much does a flight from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA) cost?
Lock in a cheap one-way flight from $218 or cheap return flight from $289 from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA)?
July is the cheapest month to fly from MLI to SEA. Timing your trip outside of the busy season is often the key to finding a great deal.
What is the cheapest airline that flies from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from MLI to SEA. Then, sort your results by "Price (lowest to highest)" to snap up a good deal.
How many flights per day from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA)?
There aren't any daily direct flights from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from MLI to SEA?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA) route, travel before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until right before your break to book a ticket from MLI to SEA often results in higher prices. While you might find some last-minute offers, they aren't always guaranteed. Keep your travel plans flexible to maximize your chances of snagging a bargain.
Is it cheaper to book a MLI to SEA flight and hotel package?
Compared with arranging hotels and flights separately, booking a MLI to SEA flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Quad City Intl. Airport (MLI) to Seattle - Tacoma Intl. Airport (SEA)?
It's generally possible to reschedule or cancel your MLI to SEA flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Quad City Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$288
Distance
1609 mi

Book with confidence

Moline to Seattle Flights

The cheapest times to fly from Moline to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Moline to Seattle are during the month of July. You can find some of the cheapest flights from Moline to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Moline to Seattle

Sunday is one of the best days to book for cheap flights from Moline to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Moline to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Moline to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $218 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Moline to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Moline to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Moline to Seattle Flights

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*Available to One Key members.